| Alan David Parker | Director | 15 Jun 1991 | 17 Dec 1991 | British | 81 years |
| Allan Nelson Woodward | Director | 15 Jun 1991 | 8 Jul 1997 | British | 81 years |
| Anthony Charles Cosgrove | Director | 13 Oct 1999 | 7 May 2019 | British | 78 years |
| Brian Neeson | Director | 19 Mar 2002 | 15 May 2004 | British | 76 years |
| Charles Glen Dunn | Director | 15 Oct 1996 | 22 Jan 2000 | British | 84 years |
| Clifford Brian Cooper | Director | 15 Jun 1991 | 11 Jun 2015 | British | 78 years |
| Clifford Brian Cooper | Secretary | 15 Jun 1991 | 11 Jun 2015 | British | - |
| Clive Edwin Jones | Director | 15 Oct 1993 | 23 May 2001 | British | 82 years |
| Geoffrey Arthur Berwick | Director | 13 Oct 1999 | 5 Apr 2004 | British | 86 years |
| Gordon Evans | Director | 11 Jun 2015 | 25 Apr 2018 | British | 74 years |
| Gordon Winspear Stephenson | Director | 15 Jun 1991 | 13 Oct 1999 | British | 81 years |
| Ian Barker | Director | 15 Jun 1991 | 23 Aug 1993 | British | 81 years |
| James Leslie Robertson | Director | 26 Mar 1996 | 25 Jun 1998 | British | 81 years |
| James Leslie Robertson | Director | 2 Mar 2000 | 7 Nov 2001 | British | 81 years |
| James Robert Carrier | Director | 10 Dec 2010 | 31 Dec 2014 | British | 74 years |
| John Evans | Director | 17 Feb 2016 | 30 Jun 2017 | British | 69 years |
| John Parkin | Director | 7 Jun 1999 | 31 May 2010 | British | 81 years |
| John William Frederick Clift | Director | 15 Jun 1991 | 27 Jul 1996 | British | 79 years |
| John William Macgregor | Director | 20 Jun 2012 | 25 Apr 2018 | British | 71 years |
| Malcolm Peter Nicholson | Director | 27 Feb 1992 | 14 Dec 1995 | British | 76 years |
| Marjorie Yarker | Director | 15 Jun 1991 | 31 Oct 1998 | British | 82 years |
| Michael John Hatcher | Director | 20 Oct 2004 | 2 Sept 2010 | British | 77 years |
| Neil Roderick Mackay | Director | 18 Jan 2006 | 25 Apr 2018 | British | 71 years |
| Nicholas John Skerrett | Director | 19 Sept 1994 | 9 Sept 2004 | British | 75 years |
| Nicholas Royston Swash | Director | 10 Dec 2010 | 31 Jan 2016 | British | 69 years |
| Nicholas Stephen Blakeley | Director | 6 Aug 2001 | 4 Oct 2010 | British | 74 years |
| Patrick Morgan Hirst | Director | 10 Sept 1997 | 4 Oct 2010 | British | 71 years |
| Paul Hutchinson | Director | 10 Feb 1993 | 27 Jun 1994 | British | 66 years |
| Peter James Sleigh | Director | 1 Oct 2015 | 7 May 2019 | British | 76 years |
| Steven Peter Matthews | Director | 11 Jun 2015 | 7 May 2019 | British | 60 years |
| Steven Peter Matthews | Secretary | 11 Jun 2015 | 7 May 2019 | - | - |
| Stuart Kevin Snelling | Director | 15 Jun 1991 | 1 Nov 1992 | British | 71 years |